The ads are everywhere. US real estate at rock-bottom prices. Posh homes in gated communities devalued 50% from a year ago. US real estate agents with nowhere to go in their own backyard are targeting Canada and other countries to attract buyers to the land of the foreclosed and the home of the bushwhacked. As the US housing market remains in crisis and foreign currencies increase in strength relative to the US dollar, foreign investment into real estate in America is reaching new highs,...